AME, Inc.
750mA CMOS LDO
AME8844
n General Description
n Functional Block Diagram
(Fixed Versions)
The AME8844 family of positive, linear regulators fea-
ture low quiescent current (45µA typ.) with low dropout
voltage, making them ideal for battery applications.
OUT
IN
Overcurrent
Shutdown
Output voltages are set at the factory and trimmed to
1.5% accuracy.
Thermal
Shutdown
These rugged devices have both Thermal Shutdown,
and Current Fold-back to prevent device failure under the
"Worst" of operating conditions.
EN
R1
V
x115%
ref
AMP
An additional feature is a “Power Good” detector, which
PG
pulls low when the output is out of regulation.
The AME8844 is stable with an output capacitance of
4.7µF or greater.
R2
V
ref
x85%
V
ref
GND
n Features
l Very Low Dropout Voltage
l Guaranteed 750mA Output
l Accurate to within 1.5%
n Functional Block Diagram
(Adjustable Version)
IN
OUT
l 45µA Quiescent Current Typically
l Over-Temperature Shutdown
l Current Limiting
Overcurrent
Shutdown
Thermal
Shutdown
l Short Circuit Current Fold-back
l Noise Reduction Bypass Capacitor (Fixed
Versions)
R1
(external)
AMP
EN
l Power-Saving Shutdown Mode
l Space-Saving MSOP-8 Package
l 6 Factory Pre-set Output Voltages
l Low Temperature Coefficient
l Adjustable Version
ADJ
1.242V
R2
(external)
GND
OUT
n Typical Applications
l Power Good Output Function.
IN
IN
OUT
n Applications
AME8844
GND
EN
PG
l Instrumentation
C1
C3
l Portable Electronics
l Wireless Devices
l PC Peripherals
5V
4.7µF
1µF
l Battery Powered Widgets
1